Index of refraction profiles of optical fibers are obtained by a new interference technique closely related to Mach-Zehnder microscope interferometry. Data are obtained from specially prepared samples using a conventional reflected light microscope. Excellent agreement is obtained with the results using the Mach-Zehnder method but at a considerable reduction in the cost and complexity of instrumentation.
© 1978 Optical Society of America
J. Stone and H. E. Earl, "Optical fiber refractometry by interference microscopy: a simplified method," Appl. Opt. 17, 3647-3652 (1978)